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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2011 OMICRON electronics GmbH
*
* based on drivers/mtd/nand/raw/nand_spl_load.c
*
* Copyright (C) 2011
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*/
#include <common.h>
#include <image.h>
#include <log.h>
#include <spi.h>
#include <spi_flash.h>
#include <errno.h>
#include <spl.h>
#include <asm/global_data.h>
#include <dm/ofnode.h>
#if CONFIG_IS_ENABLED(OS_BOOT)
/*
* Load the kernel, check for a valid header we can parse, and if found load
* the kernel and then device tree.
*/
static int spi_load_image_os(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev,
struct spi_flash *flash,
struct image_header *header)
{
int err;
/* Read for a header, parse or error out. */
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, sizeof(*header),
(void *)header);
if (image_get_magic(header) != IH_MAGIC)
return -1;
err = spl_parse_image_header(spl_image, bootdev, header);
if (err)
return err;
spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
spl_image->size, (void *)spl_image->load_addr);
/* Read device tree. */
spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
CONFIG_SYS_SPI_ARGS_SIZE,
(void *)CONFIG_SYS_SPL_ARGS_ADDR);
return 0;
}
#endif
static ulong spl_spi_fit_read(struct spl_load_info *load, ulong sector,
ulong count, void *buf)
{
struct spi_flash *flash = load->dev;
ulong ret;
ret = spi_flash_read(flash, sector, count, buf);
if (!ret)
return count;
else
return 0;
}
unsigned int __weak spl_spi_get_uboot_offs(struct spi_flash *flash)
{
return CONFIG_SYS_SPI_U_BOOT_OFFS;
}
u32 __weak spl_spi_boot_bus(void)
{
return CONFIG_SF_DEFAULT_BUS;
}
u32 __weak spl_spi_boot_cs(void)
{
return CONFIG_SF_DEFAULT_CS;
}
/*
* The main entry for SPI booting. It's necessary that SDRAM is already
* configured and available since this code loads the main U-Boot image
* from SPI into SDRAM and starts it from there.
*/
static int spl_spi_load_image(struct spl_image_info *spl_image,
struct spl_boot_device *bootdev)
{
int err = 0;
unsigned int payload_offs;
struct spi_flash *flash;
struct image_header *header;
unsigned int sf_bus = spl_spi_boot_bus();
unsigned int sf_cs = spl_spi_boot_cs();
/*
* Load U-Boot image from SPI flash into RAM
* In DM mode: defaults speed and mode will be
* taken from DT when available
*/
flash = spi_flash_probe(sf_bus, sf_cs,
CONFIG_SF_DEFAULT_SPEED,
CONFIG_SF_DEFAULT_MODE);
if (!flash) {
puts("SPI probe failed.\n");
return -ENODEV;
}
payload_offs = spl_spi_get_uboot_offs(flash);
header = spl_get_load_buffer(-sizeof(*header), sizeof(*header));
if (CONFIG_IS_ENABLED(OF_REAL)) {
payload_offs = ofnode_conf_read_int("u-boot,spl-payload-offset",
payload_offs);
}
#if CONFIG_IS_ENABLED(OS_BOOT)
if (spl_start_uboot() || spi_load_image_os(spl_image, bootdev, flash, header))
#endif
{
/* Load u-boot, mkimage header is 64 bytes. */
err = spi_flash_read(flash, payload_offs, sizeof(*header),
(void *)header);
if (err) {
debug("%s: Failed to read from SPI flash (err=%d)\n",
__func__, err);
return err;
}
if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_FULL) &&
image_get_magic(header) == FDT_MAGIC) {
err = spi_flash_read(flash, payload_offs,
roundup(fdt_totalsize(header), 4),
(void *)CONFIG_SYS_LOAD_ADDR);
if (err)
return err;
err = spl_parse_image_header(spl_image, bootdev,
(struct image_header *)CONFIG_SYS_LOAD_ADDR);
} else if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
image_get_magic(header) == FDT_MAGIC) {
struct spl_load_info load;
debug("Found FIT\n");
load.dev = flash;
load.priv = NULL;
load.filename = NULL;
load.bl_len = 1;
load.read = spl_spi_fit_read;
err = spl_load_simple_fit(spl_image, &load,
payload_offs,
header);
} else if (IS_ENABLED(CONFIG_SPL_LOAD_IMX_CONTAINER)) {
struct spl_load_info load;
load.dev = flash;
load.priv = NULL;
load.filename = NULL;
load.bl_len = 1;
load.read = spl_spi_fit_read;
err = spl_load_imx_container(spl_image, &load,
payload_offs);
} else {
err = spl_parse_image_header(spl_image, bootdev, header);
if (err)
return err;
err = spi_flash_read(flash, payload_offs + spl_image->offset,
spl_image->size,
(void *)spl_image->load_addr);
}
}
return err;
}
/* Use priorty 1 so that boards can override this */
SPL_LOAD_IMAGE_METHOD("SPI", 1, BOOT_DEVICE_SPI, spl_spi_load_image);
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